Tutor profile: Courtney W.

Questions

Subject: Basic Math

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Question:

There are 60 minutes in one hour. How many minutes are in 60 hours?

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Courtney W.

Answer:

You can use a two simple fractions to solve this.
Set the problem up like this: minutes/hours = minutes/hours.
Plug in the numbers we know, and variable x for the unknown: 60/1 = x/12
Cross multiply: (1)(x)=(60)(12)
x=720
There are 720 minutes in 12 hours.

Subject: Biology

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Question:

What is a single piece of coiled DNA called?

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Courtney W.

Answer:

A single coiled DNA is called a chromosome. Each human contains 23 pairs of chromosomes, making up 46 chromosomes in total.

Subject: Algebra

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Question:

Johnathan went to the store to buys pants and socks. Johnathan bought a pair of pants for $42 dollars. This is 14 less than twice what he spend on his socks. How much were the socks?

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Courtney W.

Answer:

So, lets make the variable p represent the price of the pants and the variable s represent the price of the socks.
This makes p=42 and p=2s-14.
Simply plug in the known variable p into the second equation to solve for s, the price of the socks.
42=2s-14, add 14 to both sides.
56=2s, divide each side by 2 to isolate the variable.
28=s
s=$28
The price of the socks was $28.

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